A dangerous situation is often called a hazardous one. It was first called an hazard by the western European Crusaders after returning from the Holy Land, where they encountered and played with other gamblers in dice games. The dice game was called al zahr which is the Arabic word for dice. Later dicey situations were called hazardous with a direct reference to risk and with risk.
There are three kinds of threat levels, man made, natural and activity related. Governments often use these levels to indicate the threat level of a situation.